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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/17880
Title: Effect of hierarchical deformable motion compensation on image enhancement for DSA acquired via C-ARM
Authors: Wei L.
Shen D.
Kumar D.
Turlapati R.
Suri J.S.
Published in: Proceedings of SPIE - The International Society for Optical Engineering
Abstract: DSA images suffer from challenges like system X-ray noise and artifacts due to patient movement. In this paper, we present a two-step strategy to improve DSA image quality. First, a hierarchical deformable registration algorithm is used to register the mask frame and the bolus frame before subtraction. Second, the resulted DSA image is further enhanced by background diffusion and nonlinear normalization for better visualization. Two major changes are made in the hierarchical deformable registration algorithm for DSA images: 1) B-Spline is used to represent the deformation field in order to produce the smooth deformation field; 2) two features are defined as the attribute vector for each point in the image, i.e., original image intensity and gradient. Also, for speeding up the 2D image registration, the hierarchical motion compensation algorithm is implemented by a multi-resolution framework. The proposed method has been evaluated on a database of 73 subjects by quantitatively measuring signal-to-noise (SNR) ratio. DSA embedded with proposed strategies demonstrates an improvement of 74.1% over conventional DSA in terms of SNR. Our system runs on Eigen's DSA workstation using C++ in Windows environment. © 2008 SPIE-IS&T.
Citation: Proceedings of SPIE - The International Society for Optical Engineering, (2008). San Jose, CA
URI: https://doi.org/10.1117/12.765520
http://repository.iitr.ac.in/handle/123456789/17880
Issue Date: 2008
Keywords: Diffusion
DSA
Hierarchical deformable registration
Nonlinear normalization
ISBN: 9.78E+12
ISSN: 0277786X
Author Scopus IDs: 55461127300
7401738392
57202478211
16551423800
7005613223
Author Affiliations: Wei, L., Eigen LLC, 13366 Grass Valley Ave, Grass Valley, CA, 95945, United States
Shen, D., Department of Radiology, University of Pennsylvania, School of Medicine, PA, 19104, United States
Kumar, D., Eigen LLC, 13366 Grass Valley Ave, Grass Valley, CA, 95945, United States
Turlapati, R., Theda Clark Hospital, Appleton, University of Wisconsin, WI, 54911, United States
Suri, J.S., Eigen LLC, 13366 Grass Valley Ave, Grass Valley, CA, 95945, United States
Corresponding Author: Wei, L.; Eigen LLC, 13366 Grass Valley Ave, Grass Valley, CA, 95945, United States
Appears in Collections:Conference Publications [ME]

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